ModRtuMast (FB)
FUNCTION_BLOCK ModRtuMast EXTENDS AbbETrig
Function Block serves to send Modbus RTU requests to a server and evaluate the response
- InOut:
Scope
Name
Type
Initial
Comment
Inherited from
Input
ExecuteBOOLFALSE
A rising edge starts the operation, the output Busy goes to TRUE. In the first cycle all other inputs are read and stored, afterwards they are ignored. A falling edge does not stop the operation. After Done = TRUE or Error = TRUE and Execute = FALSE all outputs will be reset.
AbbETrig
Output
DoneBOOLFALSE
Operation is completed without error (while outputs Busy and Error are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE
AbbETrig
BusyBOOLFALSE
Operation is running (while outputs Done and Error are FALSE)
AbbETrig
ErrorBOOLFALSE
Operation is stopped with error (while outputs Busy and Done are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE. The output ErrorID gives more details about the error.
AbbETrig
Input
ComBYTE1
Number of the assigned serial interface, 1..
EndianCAA.ENDIANESSCAA.ENDIANESS.BIG
Select the endianes / byte order of data formatted as WORD
ServBYTE0
Address of the remote Modbus RTU Server device (0 = broadcast)
FctBYTE0
Function Code as specified in Modbus Protocol Specification
TimeoutWORD2000
Wait for server’s response up to Timeout milliseconds
AddrWORD0
Operand/Register address in remote Modbus RTU Server device
NbWORD0
Amount of data units to be sent/received
DataDWORD0
Address of local buffer for data to be sent or received
Output
ErrorIDERROR_ID.NO_ERROR
Code of error occured during executionNO_ERROR Execution successfully completedERR_INIT Modbus RTU not properly initialized / out of memoryERR_NOT_CONFIGURED Modbus RTU not configuredERR_FCT_NOT_SUPPORTED Function code not supportedERR_ENDIANESS_NOT_SUPPORTED Endianess / byte order not supportedERR_ILLEGAL_REGISTER_ADDRESS Illegal register addressERR_INVALID_ACCESS Invalid address of local storage of data to read/write, inputs DATA / NBERR_INTERNAL_ILLEGAL_ARGUMENT Stack reports illegal argument (internal error)ERR_INVALID_SERVER_ADDRESS Invalid server address, must be 1..247 (read) or 0,1..247 (write)ERR_DATA_SIZE Number of data to read/write exceeds capabilitiesERR_INVALID_INTERFACE Invalid COM portERR_INTERNAL_PORTING Porting layer error. Operating system signaled errorERR_INTERNAL_INVALID_HANDLE Illegal argument, unknown instance ‘pHandle’. Internal errorERR_UNEXPECTED_RESULT Unexpected result reported by stackERR_TIMEOUT Timeout expired. Server did not respond within specified timeERR_EXCEPT_01_ILLEGAL_FUNCTION Illegal function exception. Exception response by Server containing error code 01 / 16#01ERR_EXCEPT_02_ILLEGAL_DATA_ADDRESS Illegal data address. Exception response by Server containing error code 02 / 16#02ERR_EXCEPT_03_ILLEGAL_DATA_VALUE Illegal data value. Exception response by Server containing error code 03 / 16#03ERR_EXCEPT_04_SERVER_DEVICE_FAILURE Server device failure. Exception response by Server containing error code 04 / 16#04ERR_EXCEPT_05_SERVER_ACKNOWLEDGE Server acknowledge. Exception response by Server containing error code 05 / 16#05ERR_EXCEPT_06_SERVER_DEVICE_BUSY Server device busy. Exception response by Server containing error code 06 / 16#06ERR_EXCEPT_07_SERVER_NO_ACKNOWLEDGE Server no acknowledge. Exception response by Server containing error code 07 / 16#07ERR_EXCEPT_08_MEMORY_PARITY_ERROR Memory parity error. Exception response by Server containing error code 08 / 16#08ERR_EXCEPT_09_SERVER_PASSIVE Probably passive Server. Exception response by Server containing error code 09 / 16#09ERR_EXCEPT_0A_GATEWAY_PATH_UNAVAILABLE Gateway path unavailable. Exception response by Server containing error code 10 / 16#0AERR_EXCEPT_0B_GATEWAY_TARGET_DEVICE Gateway target device failed to respond. Exception response by Server containing error code 11 / 16#0BERR_INTERNAL_INVALID_STATE Invalid state, fatal internal errorERR_NO_MEMORY Not enough memoryBUSY Busy, call againERR_INTERNAL_IO Internal error in I/O layerERR_INTERNAL_ILLEGAL_STATE Protocol stack in illegal state. Fatal internal errorERR_INTERNAL_IO_RETRY Retry I/O operation. Operation not yet completed, function to be called againERR_INTERNAL_UNEXPECTED_STATE Unexpected state. Fatal internal errorERR_UNKNOWN Undefined error